Valve spring control for internal combustion engines



sept. 22, 1931.` D. G. Roos 1,824,734 VALVE `SPRING CONTROL FOR INTERNALCOMBUSTION ENGINES Filed May 2o, 1929 llllil l E a Patented Sept. 22,1931 -lElsmRel ROOS,` or., SUTH BEND,y INDAN-a viis"SiC-,Nel#Tol-THE'STUDEBAKER COR- ronA'rIoNgor soU'iH'BENp, INDIANA, Aconronetrronforivnw JERSEY i VALVE SPRING-CONTROL ron,INijnnnAncoMBUs'rroN ENGrNEs This invention relates to internalcombus-rtion kengines having valve springs'and par'- ticularly to means forarresting the surging of the springs tothe'rebyprevent'tliebreakageofthesame.; 'Y 1 The principal object of thisinventionv is to providea da'Iiifpir/ig means? for a valvefspring whichwill 'absorbe energy f therefrom to'- thus n prevent synchronousIvibration` thereof and the breakage of the saine.`

A furtherobjectis-toprovide a spring movable in conjunction with a valvespring having friction means applied thereto for dainps ing the movementof the valve spring and thus arresting the surging thereof.

A vstill further obj ect is to provide a springv movable in series witha valve spring having friction means extending parallel with the springfor damping the .movement of the valve spring and thus arresting thesurging thereof. t

The above and other objects relating to cerv tain features ofconstruction and combination of parts to be hereinafter described withref-k been a serious problem and has caused considerable trouble andexpense to the owner of the vehicle in which the-engine forms a part dueto noisy valve springs and the breakage of the same. As valve springsare necessary in internal combustion engines of the poppet valve typenow accepted as the standard design of engines, the troubles encountereddue to the surging of the springs causv ing the breakage of the springshas been one of the serious problems which engineers have sought tosolve, but so far as I am aware no fonej has 1 this difliculty. t

of onlyone .ofithe valve springs.

-' I-Iaving the aboveandotlier diiiicultiesin jinind, I' have lprovidedva -ineanswhich will absorb' energyfrom the valve spring so asto dampout vorar-rest the surging 'thereof and which will,therefore,`materially increase the Ylifel of the spring and prevent thebreakage ofthesame. f

' "Inthe'drawing in which like numerals refer to VVlike vpartsthroughout thek several views,` I have .shown for the purpose ofillustration, an internalcombustion engine 1 having a cam shaft 2therein onv whichare a plulrality of cams?) adapted to" operate valve-tappets 4 movable to open'and close the valve portsby meansof the valve6 having valve stems 7 guided invbushings 8 mounted inthe internalkcombustion engine l. The opening of the-valveportsi by the valves 6isresisted by tliecoilsprin'gs 9 which seat'at their lower ends on vthespring supportslO attached to heretofore successfully elimina-ted lSofar aslmyfinventionis concernedthe 'valves' an'dfth'eir associated partsshownin the accompanying drawings.v are identical in Y vf'formj,andffconstruction.L Therefore, I will s.

describe themeans. for arresting the surging y y The valve springQseatsfat its upper end on a flat spring 11- which .is secured toa boss12on the engine -1 by means of the screwliA Positioned betweenthe springleaf 11` and-theboss 12 are a pluralityof spring leaves 14 similar indelsignvto the spring 11 cooperating therewith for a purpose -to behereinafter@ described.

vDuring' eachzr'evol-ution ofthe camfshaft 2 the ca in 3 willoperatetoraise the tappet 4 .'andthusmovethe valve Gverticallv to openthe valve/,portrt :In sov doing the Avalve springt) will be compressedbetween the valve support 10 andthe spring 111' and as the inner endofthe spring 11 is unsupportedthe `same :will ,cause'to move'in serieswithpthevalve spring9.--A The movement ofthe spring4 4111is Iresisted'because of the friction set up by the springs;lilinterposed'between the spring: 11

and the boss 12 when the valve spring '9 compressed between said-spring11; and the valve spring. `support 10.9 In order that the valve spring 9may have a Vsubstantial seat on the Hat spring l1 the same is cut ont at15 to seat around the lbushing 8 asis clearly shown in Figure 2.

Heretofore I have mentioned only one spring 11 but it is to beunderstood that if desired a series of these springs may beusedpreferably extending longitudinally of, the

Y engine l, the springs l1 being mounted on the I bosses 12 so that eachspring lits around the bushings 8` in the manner Which Vis clearly shownin Figure 2.

It will thus be seenfrom the `foregoing description that the springs l1havelimited movement when the valve sprin'g`9 is coinpressed and thatthe movement `isresisted 'cla Y extending parallel with and frictionallyre- `v entional constructions but instead the vibecause of the springs14 Which-as illustrated maybe identical in shape and form With the` fspringv 1l but which retards the free move-` ment thereof. Because ofthe resilient sup port for the upper kendvof the spring 9 it Will nothave Vthe tendencyto surge as in the Con bratory movement thereof YWillbe damped out bythe spring ll'and surging thereof Willy be preventedbecause of the frictional resistance to its movement by the springs 14.g

While I have accomplished the desired rey vsult and the foregoingdescription is necessarily of a detailed character in order that theinvention may be completely set forth, it is to beunderstood that formalchanges and `changes relating to details `of construction andmodification of partsinay be resorted to Without departingfroin thescope or y j. r spirit of theinvention as herein claimed. i

Vhat I claim is: -f

valve spring comprising, a member'resiliently supporting an end ofsaidval've spring, and friction means for resisting deflection of saidsupporting member.A

9. Meansfor arresting the surging of a valve spring comprising, a memberresiliently supportingan end of said valvesprin'g, and spring means lforresisting deflection of said supporting member.

i 10.*;Inmaj device oftheiclass described,` a

yvalve spring, a second springv movable in series therewith, andmeansforresisting movement of said second lspring tothereby'prevent synchronousvibration, of ,said valve spring.

;. Signedby me at. SouthBend, Indiana, this 16th day ofMay,19.29.,vf y 4DELMAR G. Roos.

l. Means for damping a valvespring comvprising, a spring contacting withanend of said valve spring, and-meansfor damping Y said second namedsprings 2. Means for dampinga valve spring com* prising, a springcontactingwith an. end of l said valve spring, and spring means forldamping said second namedspring. ,l

3. Means for damping a valve spring com-. l I

prising. a spring member extending perpendicularly to the longitudinalaxis of said valve spring` and contacting Vvvith an end thereof,

and means frictionally engaging saidspring .Y i member for resisting themovement thereof.

4. ,Means for damping a valve spring'eomprising, a 'spring memberextending perpendicularlyto the longitudinal axisiof said valve springland contacting Withan end j f thereof, and a plurality of springmembers sisting movement of said spring member.

5. Means'for'arresting the surging of a valve spring comprising, asecond-spring movement Vof said second spring.

:movable in conjunction thereivith,'and means i Y for resisting theMeans for' arresting the 'surging of a valve spring comprising, a secondspringex-

